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#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
typedef unsigned char U8;
typedef unsigned int U16;
typedef signed char S8;
#define lcddb P0 //1602数据总线
sbit lcden=P3^4; //en端
sbit rs=P3^5; //rs端
sbit rw=P3^6; //rw端
//sbit dula=P2^6;
//sbit wela=P2^7;
uchar code table1[]="ch20";
uchar code table2[]=" 0x05mg/m ";
uchar num1; //存储通道采集的数据
void delay(uint x) //延时函数
{
uint a,b;
for(a=x;a>0;a--)
for(b=114;b>0;b--);
}
void delay1(uint x)
{
uint a,b;
for(a=x;a>0;a--)
for(b=100;b>0;b--);
}
void read_busy()
{
uchar busy;
lcddb = 0xff; //复位数据总线
rs = 0; //拉低rs
rw = 1; //拉高rw
do
{
lcden = 1; //使能en
busy = lcddb; //读回数据
lcden = 0; //拉低使能以便于下次产生上升沿
}
while(busy & 0x80); //判断状态字bit7位是否为1,为1侧表示忙,程序等待
}
void write_com(uchar com) //向1602写指令
{
// read_busy(); //判断忙,忙则
P0 = com;
rs = 0;
rw = 0;
lcddb = com;
lcden = 0;
delay(10);
lcden = 1;
delay(10);
lcden = 0;
}
void write_date(uchar date) //向1602写数据
{
P0=date;
rs=1;
lcden=0;
delay(10);
lcden=1;
delay(10);
lcden=0;
}
void init() //lcd初始化
{
rw=0;
write_com(0x38); //显示模式设置:16×2显示,5×7点阵,8位数据接口
delay(20);
write_com(0x0f); //显示模式设置
delay(20);
write_com(0x06); //显示模式设置:光标右移,字符不移
delay(20);
write_com(0x01); //清屏幕指令,将以前的显示内容清除
delay(20);
}
void main()
{
uchar a;
init();
write_com(0x80); //将第一个字符写在向右偏移17个字符处,为后面的由右向左划入做准备。
delay(20);
for(a=0;a<14;a++)
{
write_date(table1[a]); //向1602写入第一个数据
delay(20);
}
write_com(0xc0);
delay(50);
for(a=0;a<14;a++)
{
write_date(table2[a]); //向1602写入第二个数据
delay(40);
}
while(1);
} |
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